单项选择题

Senior managers assured investigators that （） no time were they aware of illegal activities in their Accounting Department.

A.at
B.over
C.by
D.in

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单项选择题

We are happy to announce that all employees will be receiving a bonus this month, as we have had no （） at all for 6 weeks.

A.complain
B.complaining
C.complainer
D.complaints

单项选择题

（） recent changes in government small business regulations, we will be holding a series of practical workshops to assist owners and managers.

A.Even if
B.However
C.As soon as
D.Because of

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